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Multicast routing method based on particle swarm algorithm

A particle swarm algorithm and routing technology, applied in computing, computing models, instruments, etc., can solve problems such as long computing time, and achieve fast convergence and strong robustness

Inactive Publication Date: 2009-06-03
SUN YAT SEN UNIV
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Problems solved by technology

However, the disadvantage of these two algorithms is that the calculation time is longer, because they both need to loop many times to reach convergence

Method used

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  • Multicast routing method based on particle swarm algorithm
  • Multicast routing method based on particle swarm algorithm
  • Multicast routing method based on particle swarm algorithm

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Embodiment Construction

[0024] The method of the invention will be further described below in conjunction with the accompanying drawings.

[0025] Suppose N = {V, E} is an undirected, connected network cost graph, where V is the set of nodes and E represents the set of edges. A function c evaluates the cost of each edge e in E. A subset D of V contains all target nodes (source nodes are also considered target nodes), and a subset S=V / D contains all intermediate nodes. The goal of multicast routing is to find a minimum cost tree T connecting all target nodes and some intermediate nodes. If T can be expressed as T={V * ,E *}, then the objective can be expressed by the equation as

[0026] f = MinT = min Σ e ∈ E * c ( e ) , in V * ⊆...

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Abstract

The invention aims at solving the multicast routing problem by applying a particle swarm algorithm. Firstly, a connecting network is converted into a distance complete graph based on a Floyd algorithm, and then the particle swarm algorithm is applied to searching for an optimal multicast tree on the basis of the distance complete graph. In the particle swarm algorithm, each particle is encoded into a binary character string to represent a node for constructing the multicast tree, wherein, '1' means that the node is used while '0' means that the node is not used. Each particle constructs the multicast tree by a Prim algorithm based on the binary character string; and a constructed multicast tree can be evaluated when redundant parts of the multicast tree are cut off. Experimental results prove that a better result can be obtained by the particle swarm algorithm of the invention compared with the traditional heuristic algorithm.

Description

Technical field: [0001] The invention belongs to routing technology in computer network communication, in particular to a multicast routing method using particle swarm algorithm. technical background: [0002] With the development of computer network and communication technology, the problem of multicast routing has attracted attention from all over the world. In a nutshell, the problem of multicast routing can be described as looking for information transmission paths from source nodes to multiple destination nodes according to a certain standard in a specific network. This is a fundamental problem in many communication applications, such as mass mailing, broadcast television, telephony, and video-on-demand. Therefore, how to build an efficient multicast tree has become an important issue in multicast routing applications. If the network is regarded as a connected weighted undirected network, network nodes and related links are abstracted into corresponding graph nodes an...

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Application Information

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IPC IPC(8): H04L12/56H04L12/24G06N3/00H04L45/16
Inventor 张军詹志辉黄韬
Owner SUN YAT SEN UNIV
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